/*
* Copyright (c) Microsoft Corporation. All rights reserved.
* Copyright (c) 2023 Huawei Device Co., Ltd.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* This file has been modified by Huawei to verify type inference by adding verification statements.
*/

// === tests/cases/conformance/types/thisType/thisTypeInTypePredicate.ts ===
declare function AssertType(value:any, type:string):void;
declare function filter<S>(f: (this: void, x: any) => x is S): S[];
const numbers = filter<number>((x): x is number => 'number' == typeof x)
AssertType(numbers, "number[]");
AssertType(filter<number>((x): x is number => 'number' == typeof x), "number[]");
AssertType(filter, "<S>((void, any) => x is S) => S[]");
AssertType((x): x is number => 'number' == typeof x, "(void, any) => x is number");
AssertType(x, "any");
AssertType('number' == typeof x, "boolean");
AssertType('number', "string");
AssertType(typeof x, "union");
AssertType(x, "any");


